2006-04-01 (토), 21:15 -0500, Robert Treat 쓰시길:
> On Saturday 01 April 2006 17:26, Brendan Duddridge wrote:
> > We used to use FrontBase for our databases, but we have since
> > switched to PostgreSQL for
> > performance reasons. However, FrontBase did have very nice collation
> > support.
> >
> > To get case insensitive searches (even on UTF-8 data), all you had to
> > do was alter the column
> > and set its collation to 'CASE_INSENSITIVE' like so:
> >
> > alter column "test"."Column1" to collate
> > "INFORMATION_SCHEMA"."CASE_INSENSITIVE";
> >
> > It would be VERY nice if PostgreSQL supported this as it would easily
> > allow you to write
> > case insensitive queries that use an index like:
> >
> > select * from TEST where column1 like 'SOme ValUe%' or even just use
> > the equals operator
> > for an exact match yet still case insensitive.
> >
> > Right now to get the same effect we create an index using a function
> > like 'lower(some_column)'.
> > But that requires us to write our queries like:
> >
> > select * from test where lower(column1) like lower('SOme ValUe%');
> >
> >
> > Any ideas if better collation support is in the plans for future
> > versions of PostgreSQL?
> >
>
> Improved collation support is being worked on but it's a complex problem so
> there's no realt ETA. (Developers interested in helping out our encouraged to
> send a note to -hackers). In the mean time check out the citext project:
> http://gborg.postgresql.org/project/citext/projdisplay.php
>
Does this citext data type also provide case insensitive matching for
utf8 characters, as the gentleman's frontbase collation command did?